Find the area of the gray part

Geometry Level 1

Find the area of the shaded part. Give your answer to the nearest whole number. Use $3.1416$ for the approximation of $\pi$ .

1 solution

Marvin Kalngan
Apr 22, 2021

$\text{Area=Area of the big circle - Area of the small circle}$

$\text{Area} = \pi \left(15^2-9^2 \right)$

$\text{Area} = 3.1416 \times 144 \approx \boxed{452}$